The seats of three Cabinet Ministers are also on the list - Blackburn, represented by Foreign Secretary Jack Straw, Bolton West (Education Secretary Ruth Kelly) and Edinburgh Central (Transport Secretary Alistair Darling).

Labour also fears it could lose the normally safe east London seat of Bethnal Green and Bow to George Galloway, the Glasgow MP who was expelled for his attacks on Tony Blair over the Iraq war and founded his own party, Respect.